/* ==========================================================================
   HOMEPAGE ART DIRECTION — NEXUS ROBOTICS
   Six chapters: ARRIVAL · MANIFESTO · THE COLLECTIVE · THE MACHINE ·
                 THE SYSTEM · THE JOURNEY
   Editorial-industrial system. Cyan (#00D9E8) is reserved for active
   states, progress and key moments — never decoration.
   Everything is scoped .hp-* / body.hp-scope. No shared styles touched.
   ========================================================================== */

:root {
    --hp-bg: #06080C;
    --hp-bg-2: #0B1018;
    --hp-ink: #E8EDF0;
    --hp-mute: #7C8794;
    --hp-cyan: #00D9E8;
    --hp-hair: rgba(124, 135, 148, 0.16);
    --hp-hair-strong: rgba(124, 135, 148, 0.3);
    --hp-pad: clamp(20px, 5vw, 88px);

    /* === GLOBAL Z-INDEX SYSTEM === */
    --z-page-bg: 1;
    --z-decorative-bg: 5;
    --z-decorative-num: 8;
    --z-content-bg: 10;
    --z-metadata: 15;
    --z-primary-content: 20;
    --z-interactive: 25;
    --z-navigation: 30;
    --z-overlay: 40;
}

body.hp-scope {
    background: var(--hp-bg);
    color: var(--hp-ink);
    font-family: 'Martel Sans', sans-serif;
    overflow-x: clip;
}

.hp-scope ::selection { background: var(--hp-cyan); color: #06080C; }

/* micro-label — the house style for all technical text */
.hp-scope [class*="hp-"] {}

/* ---------- shared primitives ------------------------------------------ */

.hp-scope section { position: relative; }

/* ==========================================================================
   NAVBAR — now the shared GlobalNavbar component
   (src/components/global-navbar.ts), identical across every page.
   Homepage art direction no longer styles the navbar.
   ========================================================================== */

/* ==========================================================================
   01 / ARRIVAL
   ========================================================================== */

.hp-arrival {
    min-height: 90svh;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 100px var(--hp-pad) clamp(24px, 4vh, 48px);
    overflow: clip;
}

.hp-arrival-media {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hp-arrival-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: 62% 40%;
    opacity: 0.5;
    filter: saturate(0.82) contrast(1.06);
    transform-origin: 70% 45%;
}

/* engineered darkness: left→right and bottom shades so type owns the left */
.hp-arrival-shade {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(90deg, rgba(6, 8, 12, 0.94) 0%, rgba(6, 8, 12, 0.55) 38%, rgba(6, 8, 12, 0.12) 75%, rgba(6, 8, 12, 0.3) 100%),
        linear-gradient(180deg, rgba(6, 8, 12, 0.62) 0%, transparent 26%, transparent 62%, rgba(6, 8, 12, 0.9) 100%);
}

.hp-arrival > *:not(.hp-arrival-media) { position: relative; z-index: 1; }

.hp-arrival-kicker {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    font-size: 10.5px;
    letter-spacing: 0.3em;
    color: var(--hp-mute);
    padding-bottom: 18px;
    border-bottom: 1px solid var(--hp-hair);
    margin-bottom: clamp(28px, 6vh, 64px);
    position: relative;
    z-index: 5;
}

.hp-arrival-title {
    margin: 0 0 clamp(28px, 6vh, 60px);
    font-family: 'Kanit', sans-serif;
    font-weight: 900;
    font-size: clamp(58px, 11.5vw, 176px);
    line-height: 0.94;
    letter-spacing: -0.01em;
    text-transform: uppercase;
    position: relative;
    z-index: 10;
    isolation: isolate; /* Create stacking context */
}

.hp-line { display: block; overflow: hidden; }
.hp-line-inner { display: block; will-change: transform; }

.hp-line--outline .hp-line-inner {
    color: transparent;
    -webkit-text-stroke: 1.5px rgba(232, 237, 240, 0.75);
}

.hp-arrival-foot {
    display: flex;
    align-items: flex-end;
    gap: clamp(28px, 5vw, 88px);
    flex-wrap: wrap;
    position: relative;
    z-index: 15;
    isolation: isolate;
}

.hp-arrival-units { display: flex; flex-direction: column; gap: 8px; }

.hp-meta-label {
    font-size: 9.5px;
    letter-spacing: 0.28em;
    color: var(--hp-mute);
}

.hp-meta-value {
    font-family: 'Kanit', sans-serif;
    font-weight: 600;
    font-size: 14px;
    letter-spacing: 0.14em;
    color: var(--hp-ink);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.hp-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--hp-cyan);
    box-shadow: 0 0 10px rgba(0, 217, 232, 0.8);
    animation: hp-pulse 2.4s ease-in-out infinite;
}
@keyframes hp-pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.35; } }

.hp-scrollcue {
    margin-left: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    font-size: 9.5px;
    letter-spacing: 0.34em;
    color: var(--hp-mute);
}

.hp-scrollcue-bar {
    width: 1px;
    height: 56px;
    background: var(--hp-hair-strong);
    position: relative;
    overflow: hidden;
}
.hp-scrollcue-bar::after {
    content: '';
    position: absolute;
    left: 0;
    top: -40%;
    width: 100%;
    height: 40%;
    background: var(--hp-cyan);
    animation: hp-cue 2.2s cubic-bezier(0.65, 0, 0.35, 1) infinite;
}
@keyframes hp-cue { 0% { top: -40%; } 100% { top: 110%; } }

/* ==========================================================================
   02 / MANIFESTO — asymmetrical editorial grid
   ========================================================================== */

.hp-manifesto {
    background: var(--hp-bg);
    padding: clamp(80px, 14vh, 160px) var(--hp-pad) clamp(60px, 10vh, 120px);
    display: grid;
    grid-template-columns: minmax(0, 7.2fr) minmax(260px, 2.8fr);
    grid-template-areas:
        "label label"
        "block aside"
        "block2 aside"
        "data  aside";
    column-gap: clamp(32px, 6vw, 110px);
    row-gap: clamp(32px, 6vh, 70px);
    align-content: start;
}

.hp-m-label {
    grid-area: label;
    font-size: 10.5px;
    letter-spacing: 0.3em;
    color: var(--hp-mute);
    padding-bottom: 16px;
    border-bottom: 1px solid var(--hp-hair);
}

.hp-m-block { grid-area: block; }
.hp-m-block--second { grid-area: block2; justify-self: end; text-align: right; }

.hp-m-line {
    margin: 0;
    font-family: 'Kanit', sans-serif;
    font-weight: 800;
    font-size: clamp(44px, 7vw, 110px);
    line-height: 1.0;
    letter-spacing: -0.005em;
    text-transform: uppercase;
    display: block;
    overflow: hidden;
}
.hp-m-inner { display: block; will-change: transform; }

.hp-m-line--outline .hp-m-inner {
    color: transparent;
    -webkit-text-stroke: 1.2px rgba(232, 237, 240, 0.7);
}

.hp-m-line--accent .hp-m-inner { color: var(--hp-cyan); }

.hp-m-aside {
    grid-area: aside;
    align-self: end;
    display: flex;
    flex-direction: column;
    gap: 22px;
    max-width: 420px;
    padding-bottom: 6px;
}

.hp-m-copy {
    margin: 0;
    font-size: 15px;
    line-height: 1.85;
    color: var(--hp-mute);
}
.hp-m-copy strong { color: var(--hp-ink); font-weight: 600; }

.hp-m-data {
    margin-top: 10px;
    border-top: 1px solid var(--hp-hair);
}

.hp-m-datum {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 18px;
    padding: 13px 0;
    border-bottom: 1px solid var(--hp-hair);
}
.hp-m-datum span {
    font-size: 9.5px;
    letter-spacing: 0.26em;
    color: var(--hp-mute);
}
.hp-m-datum b {
    font-family: 'Kanit', sans-serif;
    font-weight: 600;
    font-size: 13px;
    letter-spacing: 0.1em;
    color: var(--hp-ink);
    white-space: nowrap;
}

/* ==========================================================================
   03 / THE COLLECTIVE — pinned number sequence (JS pins .hp-col-stage)
   ========================================================================== */

.hp-collective {
    /* first ~14% rises out of the SYSTEM_01 scene colour (06080C) so the
       section top never reads as a hard empty band after ONLINE */
    background: linear-gradient(180deg,
        var(--hp-bg) 0%, var(--hp-bg-2) 14%, var(--hp-bg-2) 100%);
    border-top: 1px solid var(--hp-hair);
    border-bottom: 1px solid var(--hp-hair);
}

.hp-col-stage {
    height: 90svh;
    min-height: 540px;
    position: relative;
    overflow: clip;
    isolation: isolate; /* Create stacking context */
}

.hp-col-head {
    position: absolute;
    top: clamp(96px, 14vh, 140px);
    left: var(--hp-pad);
    right: var(--hp-pad);
    display: flex;
    justify-content: space-between;
    font-size: 10.5px;
    letter-spacing: 0.3em;
    color: var(--hp-mute);
    z-index: var(--z-metadata);
}

/* ---- persistent background environment (topology / network) --------
   ONE stage-level backdrop, continuous across all five statistic plates.
   The statistic is the hero; this stays at atmospheric opacity. */
.hp-col-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    overflow: clip;
}

/* faint global grid */
.hp-col-grid {
    position: absolute;
    inset: -2%;
    background-image:
        linear-gradient(rgba(124, 135, 148, 0.085) 1px, transparent 1px),
        linear-gradient(90deg, rgba(124, 135, 148, 0.085) 1px, transparent 1px);
    background-size: 72px 72px;
    -webkit-mask-image: radial-gradient(ellipse 85% 75% at 50% 48%, #000 30%, transparent 78%);
            mask-image: radial-gradient(ellipse 85% 75% at 50% 48%, #000 30%, transparent 78%);
}

/* flowing data lines + network nodes */
.hp-col-net {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}
.hp-col-net path {
    fill: none;
    stroke: rgba(0, 217, 232, 0.38);
    stroke-width: 1;
    stroke-dasharray: 340 510;
    animation: hp-col-flow 46s linear infinite;
}
.hp-col-net circle {
    fill: rgba(0, 217, 232, 0.62);
}
.hp-col-net circle:nth-of-type(3n) { fill: rgba(232, 237, 240, 0.42); }
@keyframes hp-col-flow {
    to { stroke-dashoffset: -850; }
}

/* soft cyan atmosphere */
.hp-col-glow {
    position: absolute;
    left: 50%; top: 46%;
    width: min(1100px, 120vw);
    height: min(700px, 90vh);
    transform: translate(-50%, -50%);
    background: radial-gradient(ellipse at center,
        rgba(0, 217, 232, 0.11) 0%,
        rgba(0, 217, 232, 0.055) 40%,
        transparent 70%);
}

/* drifting data particles */
.hp-col-dust {
    position: absolute;
    inset: 0;
}
.hp-col-dust i {
    position: absolute;
    width: 2px; height: 2px;
    border-radius: 50%;
    background: rgba(0, 217, 232, 0.55);
    animation: hp-col-dust var(--d, 20s) linear infinite var(--dl, 0s);
}
@keyframes hp-col-dust {
    0%   { transform: translate3d(0, 0, 0);        opacity: 0; }
    12%  { opacity: 0.7; }
    85%  { opacity: 0.5; }
    100% { transform: translate3d(14px, -46vh, 0); opacity: 0; }
}

/* number plates — ONE shared centered stage --------------------------------
   Every statistic occupies the EXACT SAME bounding box: full-stage flex,
   centred, same padding. No per-plate compositions, no special anchors. */
.hp-num {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0 var(--hp-pad) calc(clamp(16px, 3vh, 34px) + 4.5vw);
    visibility: hidden;
    z-index: var(--z-decorative-num);
    pointer-events: none;
    will-change: opacity;
    box-sizing: border-box;
}
.hp-num.is-active { visibility: visible; }
.hp-num-figure {
    font-family: 'Kanit', sans-serif;
    font-weight: 900;
    font-size: clamp(120px, 24vw, 330px);
    line-height: 0.82;
    letter-spacing: -0.02em;
    will-change: transform;
    color: var(--hp-ink);
}
.hp-num-label {
    font-family: 'Kanit', sans-serif;
    font-weight: 600;
    flex: 0 0 auto;
    max-width: 90vw;
    font-size: clamp(13px, 1.6vw, 22px);
    letter-spacing: 0.34em;
    line-height: 1.7;
    color: var(--hp-ink);
    text-transform: uppercase;
    text-wrap: balance;
    margin-top: clamp(18px, 3.2vh, 36px);
}
.hp-num-idx {
    position: absolute;
    top: clamp(150px, 22vh, 220px);
    left: 50%;
    transform: translateX(-50%);
    font-size: 10px;
    letter-spacing: 0.3em;
    color: var(--hp-mute);
    white-space: nowrap;
}
.hp-num-plus { color: var(--hp-cyan); }
.hp-num-air {
    /* AIR reads as part of THE SAME statistic: identical family, weight,
       baseline and scale as the digits — one lockup, not two numbers */
    font-weight: 900;
    letter-spacing: 0.04em;
    margin-right: 0.18em;
    color: var(--hp-ink);
}


.hp-num {
    position: absolute;
    inset: 0; /* every plate occupies the SAME visual frame */
    display: flex;
    flex-direction: column;
    visibility: hidden; /* JS sequence owns visibility */
    z-index: var(--z-decorative-num);
    pointer-events: none;
    will-change: opacity; /* renderCollective() writes it per frame */
    box-sizing: border-box;
}

.hp-num.is-active {
    visibility: visible;
}

.hp-num-figure {
    font-family: 'Kanit', sans-serif;
    font-weight: 900;
    font-size: clamp(120px, 24vw, 330px);
    line-height: 0.82;
    letter-spacing: -0.02em;
    will-change: transform;
    color: var(--hp-ink);
}

.hp-num-label {
    font-family: 'Kanit', sans-serif;
    font-weight: 600;
    font-size: clamp(13px, 1.6vw, 22px);
    letter-spacing: 0.34em;
    color: var(--hp-ink);
    text-transform: uppercase;
}

.hp-num-idx {
    font-size: 10px;
    letter-spacing: 0.3em;
    color: var(--hp-mute);
}

.hp-num-plus { color: var(--hp-cyan); }

@media (prefers-reduced-motion: reduce) {
    .hp-num {
        visibility: visible;
        position: relative;
        inset: auto;
        min-height: 50vh;
        margin-bottom: 40px;
    }

    .hp-col-stage {
        height: auto;
        padding: 60px var(--hp-pad);
    }
}

/* ==========================================================================
   04 / THE MACHINE — featured unit
   ========================================================================== */

.hp-unit {
    background: var(--hp-bg);
    padding: clamp(70px, 12vh, 140px) 0 clamp(60px, 10vh, 120px);
    border-bottom: 1px solid var(--hp-hair);
}

.hp-unit-head, .hp-system-head, .hp-index-head {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    margin: 0 var(--hp-pad) clamp(40px, 7vh, 80px);
    font-size: 10.5px;
    letter-spacing: 0.3em;
    color: var(--hp-mute);
    padding-bottom: 16px;
    border-bottom: 1px solid var(--hp-hair);
}

.hp-unit-body {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(320px, 1fr);
    gap: clamp(36px, 5vw, 90px);
    align-items: center;
    padding: 0 var(--hp-pad);
}

/* media plate with engineering crop-marks — NOT a rounded card */
.hp-unit-media {
    position: relative;
    aspect-ratio: 16 / 11;
    overflow: hidden;
}

.hp-unit-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: 50% 42%;
    filter: saturate(0.85) contrast(1.06);
    transform-origin: 50% 42%;
    will-change: transform;
}

.hp-unit-marks i {
    position: absolute;
    width: 22px;
    height: 22px;
    border-color: rgba(0, 217, 232, 0.65);
    border-style: solid;
    border-width: 0;
}
.hp-unit-marks i:nth-child(1) { top: 14px; left: 14px; border-top-width: 1px; border-left-width: 1px; }
.hp-unit-marks i:nth-child(2) { top: 14px; right: 14px; border-top-width: 1px; border-right-width: 1px; }
.hp-unit-marks i:nth-child(3) { bottom: 14px; left: 14px; border-bottom-width: 1px; border-left-width: 1px; }
.hp-unit-marks i:nth-child(4) { bottom: 14px; right: 14px; border-bottom-width: 1px; border-right-width: 1px; }

.hp-unit-tag {
    position: absolute;
    left: 14px;
    bottom: 16px;
    font-size: 9px;
    letter-spacing: 0.26em;
    color: rgba(232, 237, 240, 0.85);
    background: rgba(6, 8, 12, 0.72);
    padding: 7px 12px;
}

.hp-unit-info { position: relative; }

/* the name overlaps the media plate on wide screens */
.hp-unit-name {
    margin: 0 0 clamp(26px, 4vh, 44px) calc(clamp(36px, 5vw, 90px) * -1);
    font-family: 'Kanit', sans-serif;
    font-weight: 900;
    text-transform: uppercase;
    line-height: 0.86;
    display: flex;
    flex-direction: column;
}
.hp-unit-name-line {
    font-size: clamp(88px, 12vw, 190px);
    letter-spacing: -0.015em;
    color: var(--hp-ink);
}
.hp-unit-name-line--sub {
    font-size: clamp(30px, 3.6vw, 58px);
    font-weight: 800;
    letter-spacing: 0.3em;
    color: transparent;
    -webkit-text-stroke: 1px rgba(0, 217, 232, 0.8);
    margin-top: 10px;
}

.hp-unit-specs { border-top: 1px solid var(--hp-hair); margin-bottom: 34px; }

.hp-spec-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 24px;
    padding: 15px 0;
    border-bottom: 1px solid var(--hp-hair);
}
.hp-spec-label { font-size: 9.5px; letter-spacing: 0.28em; color: var(--hp-mute); }
.hp-spec-value {
    font-family: 'Kanit', sans-serif;
    font-weight: 600;
    font-size: 13.5px;
    letter-spacing: 0.1em;
    color: var(--hp-ink);
    text-align: right;
}
.hp-spec-value--live { color: var(--hp-cyan); display: inline-flex; align-items: center; gap: 9px; }

.hp-unit-cta {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    font-family: 'Kanit', sans-serif;
    font-weight: 700;
    font-size: 15px;
    letter-spacing: 0.2em;
    color: var(--hp-ink);
    text-decoration: none;
    padding: 18px 30px;
    border: 1px solid var(--hp-hair-strong);
    transition: border-color 0.35s ease, color 0.35s ease, background 0.35s ease;
}
.hp-unit-cta:hover {
    border-color: var(--hp-cyan);
    color: var(--hp-cyan);
    background: rgba(0, 217, 232, 0.06);
}
.hp-cta-arrow { transition: transform 0.35s cubic-bezier(0.25, 1, 0.5, 1); }
.hp-unit-cta:hover .hp-cta-arrow { transform: translateX(6px); }

.hp-unit-note { margin-top: 14px; font-size: 9.5px; letter-spacing: 0.24em; color: var(--hp-mute); }

/* ==========================================================================
   05 / THE SYSTEM — division index rows (hover reveals)
   ========================================================================== */

.hp-system {
    background: var(--hp-bg-2);
    padding: clamp(70px, 12vh, 140px) 0;
    border-bottom: 1px solid var(--hp-hair);
}

.hp-system-index { border-top: 1px solid var(--hp-hair); }

.hp-sys-row {
    position: relative;
    display: grid;
    grid-template-columns: auto auto 1fr auto;
    align-items: center;
    column-gap: clamp(20px, 3.4vw, 60px);
    padding: clamp(22px, 3.6vh, 40px) var(--hp-pad);
    border-bottom: 1px solid var(--hp-hair);
    text-decoration: none;
    color: var(--hp-ink);
    overflow: hidden;
    transition: padding 0.45s cubic-bezier(0.25, 1, 0.5, 1);
}

/* hover wash rises from the hairline — engineered, not glowy */
.hp-sys-row::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(0, 217, 232, 0.07), rgba(0, 217, 232, 0.015) 60%, transparent);
    transform: scaleY(0);
    transform-origin: bottom;
    transition: transform 0.5s cubic-bezier(0.25, 1, 0.5, 1);
}
.hp-sys-row:hover::before { transform: scaleY(1); }

.hp-sys-row > * { position: relative; }

.hp-sys-num {
    font-family: 'Kanit', sans-serif;
    font-weight: 700;
    font-size: 13px;
    letter-spacing: 0.2em;
    color: var(--hp-mute);
    transition: color 0.35s ease;
}
.hp-sys-row:hover .hp-sys-num { color: var(--hp-cyan); }

.hp-sys-name {
    font-family: 'Kanit', sans-serif;
    font-weight: 800;
    font-size: clamp(26px, 4.6vw, 68px);
    line-height: 1;
    text-transform: uppercase;
    letter-spacing: 0.01em;
    transition: transform 0.5s cubic-bezier(0.25, 1, 0.5, 1);
}
.hp-sys-row:hover .hp-sys-name { transform: translateX(clamp(8px, 1.4vw, 22px)); }

.hp-sys-tags {
    justify-self: end;
    font-size: 10px;
    letter-spacing: 0.24em;
    color: var(--hp-mute);
    text-align: right;
    transition: color 0.35s ease;
}
.hp-sys-row:hover .hp-sys-tags { color: var(--hp-ink); }

.hp-sys-go {
    font-size: 20px;
    color: var(--hp-mute);
    transition: transform 0.45s cubic-bezier(0.25, 1, 0.5, 1), color 0.35s ease;
}
.hp-sys-row:hover .hp-sys-go { transform: translate(4px, -4px); color: var(--hp-cyan); }

/* floating reveal plate — one shared cursor-following element, driven by
   JS for both the system rows and the archive rows */
.hp-sys-thumb { display: none; }

.hp-system-foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    flex-wrap: wrap;
    padding: clamp(28px, 5vh, 48px) var(--hp-pad) 0;
    font-size: 10.5px;
    letter-spacing: 0.26em;
    color: var(--hp-mute);
}

.hp-system-all {
    color: var(--hp-ink);
    text-decoration: none;
    border-bottom: 1px solid var(--hp-hair-strong);
    padding-bottom: 3px;
    transition: color 0.3s ease, border-color 0.3s ease;
}
.hp-system-all:hover { color: var(--hp-cyan); border-color: var(--hp-cyan); }

/* ==========================================================================
   06 / THE JOURNEY — archive index + closing statement
   ========================================================================== */

.hp-index {
    background: var(--hp-bg);
    padding: clamp(70px, 12vh, 140px) 0 clamp(80px, 13vh, 160px);
}

.hp-index-rows { border-top: 1px solid var(--hp-hair); }

.hp-idx-row {
    position: relative;
    display: grid;
    grid-template-columns: auto 1fr auto auto;
    align-items: center;
    column-gap: clamp(20px, 3vw, 48px);
    padding: clamp(26px, 4.4vh, 48px) var(--hp-pad);
    border-bottom: 1px solid var(--hp-hair);
    text-decoration: none;
    color: var(--hp-ink);
    transition: background 0.4s ease;
}
.hp-idx-row:hover { background: rgba(232, 237, 240, 0.025); }

.hp-idx-num {
    font-family: 'Kanit', sans-serif;
    font-weight: 700;
    font-size: 13px;
    letter-spacing: 0.2em;
    color: var(--hp-mute);
    transition: color 0.3s ease;
}
.hp-idx-row:hover .hp-idx-num { color: var(--hp-cyan); }

.hp-idx-title {
    font-family: 'Kanit', sans-serif;
    font-weight: 800;
    font-size: clamp(30px, 5vw, 78px);
    line-height: 1;
    text-transform: uppercase;
    transition: transform 0.5s cubic-bezier(0.25, 1, 0.5, 1);
}
.hp-idx-row:hover .hp-idx-title { transform: translateX(clamp(8px, 1.2vw, 18px)); }

.hp-idx-desc {
    justify-self: end;
    font-size: 10px;
    letter-spacing: 0.22em;
    color: var(--hp-mute);
    text-align: right;
}

.hp-idx-arrow {
    font-size: 22px;
    color: var(--hp-mute);
    transition: transform 0.45s cubic-bezier(0.25, 1, 0.5, 1), color 0.3s ease;
}
.hp-idx-row:hover .hp-idx-arrow { transform: translate(4px, -4px); color: var(--hp-cyan); }

/* cursor-following archival plate */
.hp-idx-float {
    position: fixed;
    top: 0;
    left: 0;
    width: 340px;
    height: 220px;
    margin: -110px 0 0 -170px;
    pointer-events: none;
    opacity: 0;
    overflow: hidden;
    z-index: 60;
    will-change: transform, opacity;
}
.hp-idx-float img { width: 100%; height: 100%; object-fit: cover; filter: saturate(0.85) contrast(1.05); }

/* closing statement */
.hp-close {
    margin: clamp(80px, 14vh, 180px) var(--hp-pad) 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
}

.hp-close-label { font-size: 10.5px; letter-spacing: 0.3em; color: var(--hp-mute); }

.hp-close-line {
    margin: 0;
    font-family: 'Kanit', sans-serif;
    font-weight: 900;
    font-size: clamp(40px, 6.4vw, 104px);
    line-height: 1.02;
    text-transform: uppercase;
    overflow: hidden;
}
.hp-close-line--outline .hp-m-inner {
    color: transparent;
    -webkit-text-stroke: 1.2px rgba(232, 237, 240, 0.7);
}

.hp-close-cta {
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
    margin-top: 26px;
}

.hp-btn {
    font-family: 'Kanit', sans-serif;
    font-weight: 700;
    font-size: 14px;
    letter-spacing: 0.22em;
    text-decoration: none;
    color: #06080C;
    background: var(--hp-ink);
    padding: 18px 34px;
    transition: background 0.35s ease, color 0.35s ease;
}
.hp-btn:hover { background: var(--hp-cyan); }

.hp-btn--ghost {
    background: transparent;
    color: var(--hp-ink);
    border: 1px solid var(--hp-hair-strong);
}
.hp-btn--ghost:hover { border-color: var(--hp-cyan); color: var(--hp-cyan); background: transparent; }

/* ==========================================================================
   RECURRING INSTRUMENT — chapter progress, fixed bottom-left
   ========================================================================== */

/* ---- GLOBAL PERSISTENT HUD - one instrument for the whole page ---- */
.hp-hud {
    position: fixed;
    inset: 0;
    z-index: 80;
    pointer-events: none;
    opacity: 0;
    font-family: 'Numans', sans-serif;
}
.hp-hud-item {
    position: absolute;
    display: flex;
    flex-direction: column;
    gap: 5px;
    font-size: 9px;
    letter-spacing: 0.3em;
}
.hp-hud-item--tl { top: 92px; left: calc(var(--hp-pad) + 8px); }
.hp-hud-item--tr { top: 92px; right: calc(var(--hp-pad) + 8px); text-align: right; }
.hp-hud-item--bl { bottom: 88px; left: calc(var(--hp-pad) + 8px); }
.hp-hud-item--br { bottom: 88px; right: calc(var(--hp-pad) + 8px); text-align: right; }
.hp-hud-key {
    color: var(--hp-mute);
    font-size: 8px;
}
.hp-hud-val {
    color: var(--hp-ink);
    padding-top: 6px;
    border-top: 1px solid var(--hp-hair-strong);
    display: flex;
    align-items: center;
    gap: 8px;
}
.hp-hud-item--tr .hp-hud-val,
.hp-hud-item--br .hp-hud-val {
    justify-content: flex-end;
}
.hp-hud-val em {
    font-style: normal;
    color: var(--hp-mute);
}
.hp-hud-val b {
    color: var(--hp-cyan);
    font-weight: 700;
}
.hp-hud-val--live {
    color: var(--hp-cyan);
}
.hp-hud-val--live .hp-dot {
    display: inline-block;
    width: 5px;
    height: 5px;
    background: var(--hp-cyan);
    border-radius: 50%;
    box-shadow: 0 0 8px rgba(0, 217, 232, 0.8);
}
#hp-hud-status-word.is-online {
    animation: hp-hud-pulse 2.4s ease-in-out infinite;
}
@keyframes hp-hud-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.55; }
}
/* sub-phase line - assembly drives this while pinned */
.hp-hud-sub {
    position: absolute;
    top: 92px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 8.5px;
    letter-spacing: 0.32em;
    color: var(--hp-mute);
    white-space: nowrap;
}
/* page progress hairline - very bottom */
.hp-hud-track {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: rgba(232, 237, 240, 0.08);
}
.hp-hud-fill {
    height: 100%;
    width: 100%;
    background: var(--hp-cyan);
    transform-origin: left;
    transform: scaleX(0);
}

@media (max-width: 900px) {
    .hp-hud-item--tl, .hp-hud-item--tr { top: 78px; }
    .hp-hud-item--bl, .hp-hud-item--br { bottom: 72px; }
    .hp-hud-item--br { display: none; }
    .hp-hud-sub { top: 78px; }
}
@media (max-width: 560px) {
    .hp-hud-item { font-size: 8px; letter-spacing: 0.24em; }
    .hp-hud-item--tr { display: none; }
    .hp-hud-item--tl { top: 76px; }
    .hp-hud-item--bl { bottom: 68px; }
    .hp-hud-sub { display: none; }
}

/* ==========================================================================
   FOOTER tone-in (footer markup is shared — just sit it on our black)
   ========================================================================== */

.hp-scope footer { background: var(--hp-bg-2); }

/* Content wrapper with proper z-index for existing sections */
.hp-content-wrapper {
    position: relative;
    z-index: var(--z-primary-content);
    isolation: isolate; /* Create stacking context */
}

/* ==========================================================================
   RESPONSIVE — mobile gets its own composition, not a shrunken desktop
   ========================================================================== */

@media (max-width: 1180px) {
    .hp-nav-trust { display: none; }
}

@media (max-width: 960px) {
    /* navbar is the shared GlobalNavbar — its own responsive rules apply */

    /* arrival: type owns the frame, image becomes texture */
    .hp-arrival-img { object-position: 78% 30%; opacity: 0.42; }
    .hp-arrival-title { font-size: clamp(52px, 14.5vw, 96px); }

    /* manifesto stacks; second block returns to the left rail */
    .hp-manifesto {
        grid-template-columns: minmax(0, 1fr);
        grid-template-areas: "label" "block" "block2" "aside" "data";
        row-gap: clamp(32px, 6vh, 64px);
    }
    .hp-m-block--second { justify-self: start; text-align: left; }

    /* collective: one shared centred stage; figures resize via clamp */

    /* machine: media first, name overlaps upward */
    .hp-unit-body { grid-template-columns: minmax(0, 1fr); }
    .hp-unit-name { margin-left: 0; margin-top: -0.6em; position: relative; z-index: 2; }
    .hp-unit-name-line { font-size: clamp(72px, 20vw, 120px); }

    /* system rows: name + arrow, tags hide */
    .hp-sys-row { grid-template-columns: auto 1fr auto; }
    .hp-sys-tags { display: none; }
    .hp-sys-thumb { display: none; }

    /* archive rows: title stacks over desc */
    .hp-idx-row { grid-template-columns: auto 1fr auto; row-gap: 8px; }
    .hp-idx-desc { grid-column: 2 / 4; justify-self: start; text-align: left; }
    .hp-idx-float { display: none; }

    .hp-close { align-items: flex-start; }

    /* instrument: smaller, still legible */

    /* Mobile constraints for decorative elements */
    .hp-num-figure {
        font-size: clamp(72px, 18vw, 150px); /* smaller on mobile */
    }

    .hp-content-wrapper {
        max-width: 90%;
        margin-left: 5%;
        margin-right: 5%;
    }
}

@media (max-width: 480px) {
    .hp-arrival-foot {
        gap: 22px;
        align-items: flex-start; /* Prevent overlapping by aligning to start */
        flex-direction: column;
    }

    .hp-arrival-units {
        width: 100%;
        margin-bottom: 16px;
    }

    .hp-scrollcue { display: none; }

    .hp-num-figure { font-size: clamp(72px, 20vw, 150px); }

    .hp-close-cta { width: 100%; }

    .hp-btn { flex: 1; text-align: center; }

    /* phones: plates stay visible — one shared centred stage scales down */
    .hp-num-figure { font-size: clamp(76px, 22vw, 150px); }
    .hp-num-label { letter-spacing: 0.24em; }
    .hp-num-idx { top: clamp(96px, 16vh, 150px); }

    .hp-col-head {
        position: static;
        margin-bottom: 20px;
    }
}

/* ==========================================================================
   REDUCED MOTION — everything visible, nothing moves
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
    .hp-scope * {
        animation-duration: 0.001s !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001s !important;
    }
    .hp-num { visibility: visible; position: relative; inset: auto; }
    .hp-col-stage { height: auto; }
    .hp-col-stage .hp-col-head { position: static; margin-bottom: 40px; padding: 110px var(--hp-pad) 0; }
    .hp-num-figure { font-size: clamp(80px, 18vw, 200px); }
    .hp-num { padding: 30px var(--hp-pad); align-items: flex-start; text-align: left; }
    }

/* ==========================================================================
   03 / THE ASSEMBLY — NEXUS // SYSTEM_01
   Scroll-driven 3D build sequence with a 6-phase narrative:
   REFERENCE → DETECT → ANALYZE → ASSEMBLE → INITIALIZE → ONLINE.
   Layout is a strict two-zone system: the central OBJECT SAFE ZONE
   (the machine) + edge TEXT SAFE ZONES (labels, HUD, statement).
   Engine: src/system01.ts. Choreography: src/system01-section.ts.
   ========================================================================== */

/* ==========================================================================
   SYSTEM_01 / THE ASSEMBLY - content-first refinement
   LAYER STACK (front to back):
     z30 frame + rail (persistent, never faded)
     z20 chapter content (L1 statements)
     z15 schematic (chapter 01 only)
     z10 vignette / bg typography (L3/L4 decoration)
     z01 3D canvas (L2 robot)
   ========================================================================== */

.hp-assembly {
    position: relative;
    height: 90svh;
    min-height: 500px;
    background: var(--hp-bg);
    overflow: clip;
}

/* ---- L2: the 3D canvas (engine drives its opacity = presence) ---- */
.s01-mount {
    position: absolute;
    inset: 0;
    z-index: 1;
}
.s01-canvas {
    display: block;
    width: 100%;
    height: 100%;
    transition: opacity 0.45s ease;
}

/* ---- L3: stage vignette - deepens edges so text zones read ---- */
.s01-vignette {
    position: absolute;
    inset: 0;
    z-index: 10;
    pointer-events: none;
    background:
        linear-gradient(90deg, rgba(6,8,12,0.62) 0%, rgba(6,8,12,0) 30%),
        linear-gradient(90deg, rgba(6,8,12,0) 70%, rgba(6,8,12,0.62) 100%),
        linear-gradient(180deg, rgba(6,8,12,0.5) 0%, rgba(6,8,12,0) 24%,
                        rgba(6,8,12,0) 64%, rgba(6,8,12,0.74) 100%);
}

/* ---- L4: decorative background typography ---- */
.s01-bgword {
    position: absolute;
    left: 50%;
    top: 44%;
    transform: translate(-50%, -50%);
    z-index: var(--z-decorative-bg); /* Lower than content, higher than page bg */
    font-family: 'Kanit', sans-serif;
    font-weight: 900;
    font-size: clamp(120px, 26vw, 420px);
    letter-spacing: 0.02em;
    color: rgba(232, 237, 240, 0.14);
    opacity: 0.14;
    white-space: nowrap;
    pointer-events: none;
    user-select: none;
}

/* ---- chapter progress rail (right edge, part of the frame) ---- */
.s01-rail {
    position: absolute;
    right: calc(var(--hp-pad) + 10px);
    top: 50%;
    transform: translateY(-50%);
    z-index: 30;
    display: flex;
    flex-direction: column;
    gap: 14px;
    align-items: flex-end;
    pointer-events: none;
}
.s01-rail i {
    display: block;
    width: 14px;
    height: 1px;
    background: var(--hp-hair-strong);
    transition: background 0.4s ease, width 0.4s ease;
}
.s01-rail i.is-past { background: rgba(0, 217, 232, 0.35); }
.s01-rail i.is-active { background: var(--hp-cyan); width: 26px; }

/* ---- chapter content blocks ---- */
.s01-chapters {
    position: absolute;
    inset: 0;
    z-index: var(--z-primary-content); /* Higher than decorative elements */
    pointer-events: none;
}
.s01-ch {
    position: absolute; /* modifier classes own left/top/right/bottom */
    left: calc(var(--hp-pad) + 8px);
    top: 50%;
    transform: translateY(-50%);
    translate: 0 var(--chy, 0px); /* calm ±8px crossfade settle */
    max-width: 400px;
    visibility: hidden;
    opacity: 0;
    /* positioned + z-index already creates the stacking context */
    z-index: var(--z-primary-content);
}
.s01-ch-kicker {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 9px;
    letter-spacing: 0.32em;
    color: var(--hp-cyan);
    margin-bottom: 22px;
}
.s01-ch-kicker i {
    display: block;
    width: 26px;
    height: 1px;
    background: var(--hp-cyan);
    opacity: 0.7;
}
.s01-ch-title {
    font-family: 'Kanit', sans-serif;
    font-weight: 800;
    font-size: clamp(34px, 4.6vw, 62px);
    line-height: 1.02;
    letter-spacing: 0.01em;
    color: var(--hp-ink);
    margin: 0 0 20px;
}
.s01-ch-title span {
    color: var(--hp-cyan);
}
.s01-ch-title--sm { font-size: clamp(28px, 3.6vw, 46px); }
.s01-ch-title--final { font-size: clamp(38px, 5.4vw, 72px); }
.s01-ch-body {
    font-size: 13.5px;
    line-height: 1.75;
    letter-spacing: 0.02em;
    color: #A7B2BC;
    max-width: 360px;
    margin: 0;
}
.s01-ch-body--sm { max-width: 300px; }

/* ---- chapter text zones -----------------------------------------------
   ZONE A (left) is ONE shared anchor: REFERENCE / DETECT / ANALYZE use
   the exact same position and box, so the panel changes state rather
   than jumping between per-chapter anchors. --chy is the ±8px crossfade
   drift the render loop writes; transitions stay calm and overlapping. */
.s01-ch--left {
    left: max(6vw, calc(var(--hp-pad) - 14px));
    top: 50%;
    transform: translateY(-50%);
    /* ONE identical slot: same x, same y, same width, same min-height —
       the three chapters read as one panel changing state, never a jump */
    width: min(430px, 86vw);
    min-height: clamp(300px, 46vh, 440px);
}
.s01-ch--assemble {
    left: 50%;
    top: 16%;
    transform: translate(-50%, 0);
    text-align: center;
    max-width: 460px;
}
.s01-ch--assemble .s01-ch-kicker { justify-content: center; }
.s01-ch--sync {
    left: auto;
    right: max(6vw, calc(var(--hp-pad) - 14px));
    max-width: 420px;
    padding-right: clamp(18px, 2.4vw, 34px);
}
.s01-ch--sync .s01-ch-body {
    line-height: 1.85;
    max-width: 380px;
}
.s01-ch--sync .s01-ch-title { font-size: clamp(26px, 3.2vw, 44px); }
.s01-ch--online {
    left: max(6vw, calc(var(--hp-pad) - 14px));
    bottom: clamp(96px, 14vh, 148px);
    top: auto;
    transform: none;
    max-width: 460px;
}

/* module counter (DETECT) */
.s01-ch-data {
    margin-top: 26px;
    display: flex;
    align-items: baseline;
    gap: 10px;
    font-size: 9px;
    letter-spacing: 0.28em;
    color: var(--hp-mute);
}
.s01-ch-data b {
    font-family: 'Kanit', sans-serif;
    font-weight: 700;
    font-size: 22px;
    letter-spacing: 0.04em;
    color: var(--hp-cyan);
    font-variant-numeric: tabular-nums;
}

/* SYNCHRONIZE system links */
.s01-links {
    list-style: none;
    margin: 30px 0 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.s01-links li {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 10px;
    letter-spacing: 0.3em;
    color: var(--hp-mute);
}
.s01-links li span { color: var(--hp-ink); min-width: 130px; }
.s01-links li i {
    flex: 1;
    max-width: 120px;
    height: 1px;
    background: var(--hp-hair-strong);
    position: relative;
    overflow: hidden;
}
.s01-links li i::after {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--hp-cyan);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}
.s01-links li em {
    font-style: normal;
    font-size: 8px;
    color: var(--hp-mute);
    letter-spacing: 0.3em;
    opacity: 0;
    transition: opacity 0.5s ease 0.25s;
}
.s01-links li.is-linked i::after { transform: scaleX(1); }
.s01-links li.is-linked em { opacity: 1; color: var(--hp-cyan); }
.s01-links li.is-linked span { color: var(--hp-ink); }

/* ONLINE final metadata */
.s01-final-meta {
    margin-top: 30px;
    display: flex;
    gap: 26px;
    font-size: 9px;
    letter-spacing: 0.3em;
    color: var(--hp-mute);
}
.s01-final-meta span { position: relative; }
.s01-final-meta span + span::before {
    content: '';
    position: absolute;
    left: -14px;
    top: 50%;
    width: 4px;
    height: 4px;
    transform: translate(0, -50%) rotate(45deg);
    background: var(--hp-cyan);
    opacity: 0.55;
}

/* ---- blueprint: the REAL NEXUS chassis sheet --------------------------
   public/images/nexus-blueprint.png is pre-processed to alpha linework
   (dark field -> transparent), so it floats on the stage background
   with NO rectangular boundary at any opacity. The render loop drives
   opacity + a slow camera-drift transform; CSS adds the inspection
   scanline (one thin pass, low opacity, faint glow). */
.s01-blueprint {
    position: relative;
    width: min(900px, 76vw);
    opacity: 0;
    will-change: opacity, transform;
    transform: translate3d(0, 0, 0) scale(1.03);
}
.s01-blueprint img {
    display: block;
    width: 100%;
    height: auto;
    /* the sheet's linework is dim grey-cyan; lift it into the site's
       luminance range while staying a drawing, not a poster */
    filter: brightness(1.5) contrast(1.12) saturate(1.3);
}

/* engineering inspection scanner — NOT a laser */
.s01-scan {
    position: absolute;
    left: 3%;
    right: 3%;
    top: 0;
    height: 2px;
    background: linear-gradient(90deg,
        transparent 0%, rgba(0, 217, 232, 0.65) 18%,
        rgba(0, 217, 232, 0.9) 50%,
        rgba(0, 217, 232, 0.65) 82%, transparent 100%);
    box-shadow: 0 0 16px 2px rgba(0, 217, 232, 0.3);
    animation: s01-scan 5.2s cubic-bezier(0.37, 0, 0.63, 1) infinite;
    will-change: top, opacity;
}
@keyframes s01-scan {
    0%   { top: 1.5%; opacity: 0; }
    10%  { opacity: 0.85; }
    88%  { opacity: 0.85; }
    100% { top: 98.5%; opacity: 0; }
}

/* ---- ambient background language --------------------------------------
   ONE layer stack; opacity of each effect is derived from the SAME
   SYSTEM_01 progress scalar inside renderSystem01(). Internal motion is
   cheap compositor-friendly CSS only. TEXT = STABLE / BG = SUBTLE. */
.s01-ambient {
    position: absolute;
    inset: 0;
    z-index: 12;                 /* above vignette(10), below schematic(15) */
    pointer-events: none;
    overflow: clip;
}
.s01-amb {
    position: absolute;
    inset: 0;
    opacity: 0;
    will-change: opacity;
}

/* 02 DETECT — radar rings + scanning band + detection blips */
.s01-amb--radar,
.s01-amb--sweep,
.s01-amb--pts {
    position: absolute;
    inset: 0;
}
.s01-amb--radar::before,
.s01-amb--radar::after {
    content: '';
    position: absolute;
    left: 66%;
    top: 50%;
    border-radius: 50%;
    border: 1px solid rgba(0, 217, 232, 0.24);
    translate: -50% -50%;
}
.s01-amb--radar::before {
    width: 46vmin;
    height: 46vmin;
    animation: s01-radar-pulse 4.2s ease-out infinite;
}
.s01-amb--radar::after {
    width: 26vmin;
    height: 26vmin;
    border-color: rgba(0, 217, 232, 0.3);
    animation: s01-radar-pulse 4.2s ease-out 2.1s infinite;
}
@keyframes s01-radar-pulse {
    0%   { scale: 0.82; opacity: 0; }
    30%  { opacity: 1; }
    100% { scale: 1.12; opacity: 0; }
}
.s01-amb--sweep::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 30%;
    background: linear-gradient(90deg,
        transparent, rgba(0, 217, 232, 0.08) 50%, transparent);
    animation: s01-sweep 7s cubic-bezier(0.45, 0.05, 0.55, 0.95) infinite;
    will-change: transform;
}
@keyframes s01-sweep {
    0%   { transform: translateX(-110%); }
    100% { transform: translateX(420%); }
}
.s01-amb--pts i {
    position: absolute;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: rgba(0, 217, 232, 0.5);
    animation: s01-blip 3.4s ease-out infinite;
}
.s01-amb--pts i::after {
    content: '';
    position: absolute;
    inset: -7px;
    border-radius: 50%;
    border: 1px solid rgba(0, 217, 232, 0.35);
    animation: s01-blip-ring 3.4s ease-out infinite;
}
@keyframes s01-blip {
    0%, 100% { opacity: 0; }
    15%      { opacity: 1; }
    60%      { opacity: 0.35; }
}
@keyframes s01-blip-ring {
    0%   { scale: 0.4; opacity: 0; }
    25%  { opacity: 0.8; }
    100% { scale: 1.6; opacity: 0; }
}

/* 03 ANALYZE — coordinate grid focused on the machine */
.s01-amb--grid {
    background-image:
        linear-gradient(rgba(124, 135, 148, 0.11) 1px, transparent 1px),
        linear-gradient(90deg, rgba(124, 135, 148, 0.11) 1px, transparent 1px);
    background-size: 56px 56px;
    -webkit-mask-image: radial-gradient(ellipse 44% 52% at 64% 50%, #000 20%, transparent 75%);
            mask-image: radial-gradient(ellipse 44% 52% at 64% 50%, #000 20%, transparent 75%);
    animation: s01-grid-drift 26s linear infinite;
}
@keyframes s01-grid-drift {
    to { background-position: 56px 28px; }
}

/* 04 ASSEMBLE — faint volumetric light from above */
.s01-amb--beam::before {
    content: '';
    position: absolute;
    left: 50%;
    top: -4%;
    width: min(560px, 46vw);
    height: 88%;
    translate: -50% 0;
    background: linear-gradient(180deg,
        rgba(0, 217, 232, 0.1) 0%,
        rgba(0, 217, 232, 0.035) 55%,
        transparent 85%);
    clip-path: polygon(41% 0, 59% 0, 100% 100%, 0 100%);
}

/* atmospheric data particles (ASSEMBLE -> ONLINE) */
.s01-amb--dust i {
    position: absolute;
    width: 2px;
    height: 2px;
    border-radius: 50%;
    background: rgba(0, 217, 232, 0.35);
    animation: s01-dust var(--d, 20s) linear infinite var(--dl, 0s);
}
@keyframes s01-dust {
    0%   { transform: translate3d(0, 8vh, 0); opacity: 0; }
    10%  { opacity: 0.5; }
    85%  { opacity: 0.35; }
    100% { transform: translate3d(10px, -42vh, 0); opacity: 0; }
}

/* 05 SYNCHRONIZE — five divisions as nodes; --net (0..1) draws links */
.s01-amb--net {
    width: 100%;
    height: 100%;
}
.s01-net-line {
    stroke: rgba(0, 217, 232, 0.3);
    stroke-width: 1;
    stroke-dasharray: 300 300;
    stroke-dashoffset: calc(300px * (1 - clamp(calc(var(--net, 0) * 6 - var(--i, 0)), 0, 1)));
    transition: stroke-dashoffset 0.35s linear;
}
.s01-net-node {
    fill: rgba(232, 237, 240, 0.85);
    opacity: clamp(calc(var(--net, 0) * 6 - var(--i, 0) - 0.35), 0, 0.9);
    transition: opacity 0.35s linear;
}
.s01-net-halo {
    fill: none;
    stroke: rgba(0, 217, 232, 0.22);
    stroke-width: 1;
    opacity: clamp(calc(var(--net, 0) * 6 - var(--i, 0) - 0.6), 0, 0.8);
    transition: opacity 0.35s linear;
    animation: s01-halo 3.2s ease-in-out infinite;
    transform-box: fill-box;
    transform-origin: center;
}
@keyframes s01-halo {
    0%, 100% { scale: 1; }
    50%      { scale: 1.28; }
}
.s01-net-core {
    fill: rgba(0, 217, 232, 0.9);
    opacity: clamp(calc(var(--net, 0) * 2 - 0.2), 0, 1);
    transition: opacity 0.35s linear;
}
/* stagger indexes — children 1-5 are the lines, 6-10 the halos */
.s01-amb--net > :nth-child(1)  { --i: 0.1; }
.s01-amb--net > :nth-child(2)  { --i: 0.9; }
.s01-amb--net > :nth-child(3)  { --i: 1.7; }
.s01-amb--net > :nth-child(4)  { --i: 2.5; }
.s01-amb--net > :nth-child(5)  { --i: 3.3; }
.s01-amb--net > :nth-child(6)  { --i: 0.1; }
.s01-amb--net > :nth-child(7)  { --i: 0.9; }
.s01-amb--net > :nth-child(8)  { --i: 1.7; }
.s01-amb--net > :nth-child(9)  { --i: 2.5; }
.s01-amb--net > :nth-child(10) { --i: 3.3; }

/* 06 ONLINE — restrained cyan atmosphere */
.s01-amb--glow::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 56%;
    width: min(1200px, 130vw);
    height: min(760px, 95vh);
    translate: -50% -50%;
    border-radius: 50%;
    background: radial-gradient(ellipse at center,
        rgba(0, 217, 232, 0.085) 0%,
        rgba(0, 217, 232, 0.04) 38%,
        transparent 68%);
}


/* ---- disciplines: expanding editorial descriptions (FIX / SECTION 05) ---- */
.hp-sys-desc {
    grid-column: 2 / 5;
    grid-row: 2;
    max-width: 560px;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transform: translateY(-4px);
    transition: max-height 0.5s cubic-bezier(0.22, 1, 0.36, 1),
                opacity 0.4s ease,
                transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}
.hp-sys-row { position: relative; }
.hp-sys-desc-text {
    display: block;
    font-family: 'Martel Sans', sans-serif;
    font-size: 13px;
    line-height: 1.7;
    letter-spacing: 0.02em;
    color: #A7B2BC;
    padding-bottom: 6px;
}
.hp-sys-desc-spec {
    display: block;
    font-family: 'Numans', sans-serif;
    font-size: 9px;
    letter-spacing: 0.24em;
    color: var(--hp-mute);
    padding-bottom: 14px;
}
.hp-sys-desc-spec::before {
    content: '';
    display: inline-block;
    width: 22px;
    height: 1px;
    background: var(--hp-cyan);
    opacity: 0.6;
    margin-right: 10px;
    vertical-align: middle;
}
.hp-sys-row:hover .hp-sys-desc,
.hp-sys-row:focus-visible .hp-sys-desc,
.hp-sys-row.is-open .hp-sys-desc {
    max-height: 120px;
    opacity: 1;
    transform: translateY(0);
}
.hp-sys-row:hover .hp-sys-desc .hp-sys-desc-spec {
    color: var(--hp-cyan);
}

/* ---- ending: idea-to-future story strip ---- */
.hp-close-story {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    font-family: 'Numans', sans-serif;
    font-size: 9.5px;
    letter-spacing: 0.3em;
    color: var(--hp-mute);
    margin-bottom: 34px;
}
.hp-close-story span { position: relative; }
.hp-close-story span.hp-close-story-end { color: var(--hp-cyan); }
.hp-close-story i {
    font-style: normal;
    color: var(--hp-hair-strong);
    font-size: 11px;
}
.hp-close-cta { margin-top: 40px; }

@media (max-width: 960px) {
    /* no hover on touch: descriptions become always-visible editorial rows */
    .hp-sys-desc {
        max-height: 200px;
        opacity: 1;
        transform: none;
        grid-column: 1 / 4;
    }
    .hp-sys-desc-spec { color: var(--hp-cyan); }
    .hp-close-story { gap: 8px; font-size: 8.5px; letter-spacing: 0.22em; }
    .hp-close-story i { display: none; }
    .hp-close-story span + span::before {
        content: '·';
        margin-right: 8px;
        color: var(--hp-hair-strong);
    }
}

/* ---- static fallback ---- */
.hp-assembly.is-static { height: auto; min-height: 100svh; }
.hp-assembly.is-static .s01-mount,
.hp-assembly.is-static .s01-bgword,
.hp-assembly.is-static .s01-chapters .s01-ch:not(.s01-ch--online) {
    display: none;
}
.hp-assembly.is-static .s01-schematic {
    position: relative;
    opacity: 0.85;
}
.hp-assembly.is-static .s01-blueprint { opacity: 0.85; transform: none; }
.hp-assembly.is-static .s01-scan { display: none; }
.hp-assembly.is-static .s01-ch--online {
    visibility: visible;
    opacity: 1;
}

/* ---- responsive: portrait / tablet ---- */
@media (max-width: 900px) {
    .s01-blueprint { width: min(640px, 88vw); }
    .s01-ch--sync .s01-ch-body { max-width: 300px; }
    .s01-rail { right: 16px; }
    .s01-bgword { font-size: clamp(90px, 21vw, 200px); top: 40%; }
    .s01-ch { max-width: min(400px, 72vw); }
    .s01-ch--assemble { top: 13%; }
    .s01-ch--sync {
        right: auto;
        left: calc(var(--hp-pad) + 8px);
    }
    .s01-ch--online { bottom: 130px; }
    .s01-links li span { min-width: 104px; }
}

@media (max-width: 560px) {
    .s01-blueprint { width: 92vw; }
    .s01-amb--net { opacity: 0.6; }
    .s01-bgword { font-size: clamp(70px, 24vw, 140px); }
    .s01-ch { max-width: 78vw; }
    .s01-ch-title { font-size: clamp(26px, 8.4vw, 40px); }
    .s01-ch--sync .s01-ch-title { font-size: clamp(20px, 6.4vw, 30px); }
    .s01-ch--online { bottom: 122px; }
    .s01-final-meta { gap: 16px; flex-wrap: wrap; }
    .s01-schematic-svg { width: min(560px, 86vw); }
    .s01-links li { gap: 10px; }
    .s01-links li i { max-width: 70px; }
}

/* ---- reduced motion ---- */
@media (prefers-reduced-motion: reduce) {
    .hp-hud { opacity: 0.45 !important; }
    .hp-hud-sub { display: none; }

    .hp-assembly { height: auto; min-height: 70svh; }
    .hp-assembly .s01-rail,
    .hp-assembly .s01-bgword { display: none; }
    .hp-assembly .s01-ch { display: none; }
    .hp-assembly .s01-ch--online { display: block; }
    .hp-assembly .s01-schematic { position: relative; }
    .hp-assembly .s01-ch--online {
        opacity: 1;
        visibility: visible;
        position: relative;
        inset: auto;
        transform: none;
        margin: 40px var(--hp-pad) 70px;
    }
}